Degree day information indicates that alfalfa weevil larvae should be hatching throughout central and southern Iowa. The snow of April 16 may have frozen some of the larvae, but there are always some larvae that survive these adverse environmental conditions. Proper management of this insect will require timely scouting, correct identification, determining population levels, and if necessary, cultural or chemical control.
Iowa State University
Rice, Marlin E., "Alfalfa weevils are hatching" (1999). Integrated Crop Management News. 2123.
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